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Q6 Q19.) Write the expression as the​ sine, cosine, or tangent of an angle. Then find the exact value of the expression.
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Q6 Q19.) Write the expression as the​ sine, cosine, or tangent of an angle. Then find the exact value of the expression.

Q6 Q19.) Write the expression as the​ sine, cosine, or tangent of an angle. Then find-example-1
User Kyuuji
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1 Answer

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using sin(A+B) = sinAcosB + cosAsinB

sin20cos40 + cos20sin40 = sin(20+40) = sin60degree

=
( √(3) )/(2)
User Zztops
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